Disintegrating-mill



v 3 Sheets-Sheet 1. L. J. BENNETT.

D ISINTEG-RATING MILL.

Patented Nov. 29,1881.

III/IIIIIIIIIIIIIIIIIIII (No Model.)

(No Model.) 43 Sheets-Sheet 2.

L. J. BENNETT.

DISINTBGRATING MILL. No. 250,125'. Patented Nov. 29,1881.

NKY @s Rx N N s@ www w Q I1 1 I l l l i e .l I l l (No Model.) 3 Sheets-Sheet 3.

L. J. BENNETT.

. DISINTEGRATING MILL.

No. 250,125. Patented N'ov..29,'1881.

Jay.;

UNITED STATES PATENT OEEECE@ LEWIS J. BENNETT, OF BUFFALO, NEW YORK.

. DISINTEGRATING-MILL.

SPECIFICATION forming part of Letters Patent No. 250,125, dated November 29, 1881.

Application filed February 3, 1881.

To all whom it may concern Be it known that I, LEWIS J. BENNETT, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Disintegrating-Mills, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates more particularly to that class of mills which consist of two cages provided with concentric rows of disintegrating pins or rods, and revolving in opposite directions within a casing, and in which the material is fedinto the mill near the axis of rotation and driven by centrifugal force through the several concentric rows of disintegrating-A pins, whereby the material is pulverized.

The object of this invention is to increase the eflciency of mills of this kind, and to render them more durable in construction and better capable of being readily repaired and kept: in effective Workin g condition.

My invention consistsfto that end, of the particular construction and combination of the various parts which enter into the construction of myimproved disintegrating-mill, as hereinafter fully set forth and pointed out in the claims.

In the accompanying drawings, consisting ot' three sheets, Figure l is a longitudinal vertical section of my improved machine. Fig. 2 is a fragmentary vertical section of the disintegrating mechanism on an enlarged scale. Fig. 3 is a fragmentary vertical section in line x w, Fig. 2. Fig. 4 is a side elevation of the machine. Fig. 5 is a vertical section in line y y, Fig. 4, on an enlarged scale. Fig. 6 is a fragmentary elevation, on an enlarged scale, of the protecting-rin g applied to one of the disks. Fig. 7 is a section in line e' z, Fig. 6.

Like letters of reference refer to like parts in the several figures.

A A represent the lower side pieces of the mill-casing, provided at their lower ends with anges a a', by which they are secured to anges b, formed on the upper side of the chute B, and by which the casing is supported on a suitable foundation, B.

c c represent respectively the solid and hollow horizontal driving-shafts, upon which the revolving cages are mounted. The solid shaft c is supported at one end ina standard-bearing, C, which rests on the bottom flange a of (No model.)

the lower side piece, A', of the casing, and at the other end in a bearing, O', which is formed in a standard, C2, supported on the foundation B. The hollow shaft c turns in a bearing, O3, cast in one piece, with the lower side piece, A, of the casing, and in a bearing, O4, formed in the same standard C2 which supports the bearin g C.

B represents a pulley, mounted on the end ot' the solid shaft c, and D a pulley secured to the hollow shaft c. The two pulleys D D' are driven in opposite directions in any suitable manner. d d are adjustable collars secured to the hollow shaft c', between the bearings()3 C* of the same, for retaining the shaft in its proper position longitudinally, and permitting its position to be adjusted.

c represents a circular' flange formed on the end of the hollow shaft c', within the casing; and E is a metallic disk, preferably constructed of wrought-iron and secured to the flange c by rivets or otherwise.

F is a cast disk mounted on the solid shaft c within the casing, in close proximity to the disk E. The. disks E and F form the bodies of the two cages, which revolve in opposite directions within the case.

G represents the innermost concentric row of disintegrating pins or rods, and G', G2, and G3 are the successive concentric rows of pins or rods, arranged between theinner row of pins, G, and the periphery of the casing. The pins G in the innerrow are secured at one side to the disk F, and at the other side to an annular plate, H, to which are also secured pins G2 of the third row. The pins G and G3, constituting the second and fourth rows, are secured to the disk E. Each pin is composed ot' a sleeve or hollow bar of chilled cast-iron and a wrought` iron bolt which forms the core of the cast-iron pin, and serves at the same time to secure the pin to its supporting disks or plates. The pins G in the inner row present a slightly convex face, g, to the axis of rotation, and lat or angular faces g in an opposite direction to the pins G in the next succeeding row. The inner faces, g, of the pins G are set preferably alternately nearer the axis of rotation and farther from it, as represented in Fig. 3, whereby the spaces which the succeeding pins leave in the rotation between their inner faces and the stationary breaker I are alternately reduced and increased, thereby forming shoulders of unequal depth, by which the material is effectually'broken up between these pins and the breaker. The pins G', G2, and G3 in the outer three rows are made square and arranged with one edge toward the axis of rotation, so as to present flat surfaces in the direction in which the material to be disintegrated is encountered. This material is rst broken upebetween the inner pins, G. and the breaker l, and then struck in its iiight by the flat faces of the second row ot' pins, G', which, in turn, throws the material against the flat faces of the third row, G2, the latter iinally throwing the material against the flat faces of the Vfourth row, G2. The material is therefore subjected, in its passage through the several rows of pins, to a succession of violent blows delivered by iiat surfaces, whiehstrike each particle equally, whereby the full force of each blow is rendered effective in disintegrating the material, while in machines employing round pins the greater number of lthe blows delivered are, more or less, glancing blows, and only partially effective. The reduction of the material is therefore effected in in, i machine more speedily and completely and with a smaller expenditure of power than in machines having round pins. The square pins G' G2 Gg are fitted with one end in square sockets or recesses in the rings and disks to which they are secured, whereby the pins are prevented from turning on their bolts and enabled to be readily re- A versed, so as to bring their outer faces inward when their inner faces are worn away. The arrangement ofthe pins G' G2 G3, with their edges toward each other, forms spaces-be tween the pins which rapidly contract toward the adjacent edges ofthe pins, and as rapidly expand outward, whereby a free escape of the disintegrated material is insured.

K represents a ring of right-angular cross section, secured to the periphery ofthe disk F to protect the same from the abrading eli'ect of the material which is being disintegrated. The web 7s of the ring K is placed against the rear side of the disk F, and is provided on its rear side with depression It', in which are arranged the nuts of the bolts g2, by which the pins G are secured to the disk F. 'lhe nuts are protected by the depression k' from the cutting effect of the disintegrated material. The ring K is composed of a suitable number of sections, and can be readily detached from the disk F and be replaced by a new ring when worn out.

L represents a ring of right-angular crossseetion, which is secured to the inner edge of the annular plate H. The latter is protected I on its inner side by a removable chilled plate,

H', and the ring L is placed against the inner side of the plate H' and overlaps with its flange l the inner 'edges of both plates H H'. The iiange Z projects beyond the outer side of the plate H and runs in close contact with a ring, l', secured to the casin g, whereby the material operated upon is prevented from escaping be-` tween the ring L and the side of the casing,

and the nuts Z2 of the bolts g2 are protected against the cutting action of the disintegrated material. rlhe disk F and the ring L are provided on their inner sides with sockets fis, respectively, in which the ends of the pins G enter, and which prevent the pins from turning. The bolts g2 securethe pins G to the disk F and plate H, and at the same time secure the ring K to the'disk F,'and the ring L and plate H' to the plate H.

M represents a rin g of wrou ght-iron arranged on the inner side of the protecting-plate H', near its outer edge, and M' is a ring of castiron, preferably chilled, which is arranged on the plate H' to cover the ring M, the ring M' being provided on its back with a depression, m, in which the ring M tits. v i

N is a ring of right-angular cross-section, secured to the outer side of the plate H and overlapping the outer edges of the plates H H'vand bearing against the back of the ring M. The ring N is provided on its outer side with depressions u, in which are arranged the nuts n', which are applied to the ends of the bolts g4, passing through the pins G2. The ring M is provided ou its inner side with square depressions, in which the ends of the pins G2 are held. The opposite ends of the pinsG2 are fitted against a ring, M2, of cast-iron, which is placed over a ring, M2, of wrought-iron, ther latter being fitted in a groove in the outer side of the ring M2.

Ml is a ring of cast-iron secured to the outer side of the rings M2 and M3, and provided on its outer side with depressions m', in which the nuts m2, applied to the ends ofthe bolts g4, are protected. rlhe bolts g pass through all the rings and plates and secure the parts firmly together, while permitting the removal of any ot' the parts upon withdrawing the bolts g4.

The cast rings lll' and M2 are preferably composed of aA suitable number of sections for convenience in casting and in applying them to and removing them from the other parts. The several sections constituting each ring are held together by the wrought-iron rings M and M2, which lie in the grooves of the cast sections.

The pins G' are secured at one side to the disk E by means of a cast ring, 0, which is placed againstthe wear-plate E', applied to the inner side of the disk E, and the sections of which the ring ois composed are held together by a wrought-iron ring, o', tittedin a groove, o2, in the back ofthe ring o. The pins G' are Secured at the opposite side in a cast ring, o3, the several sections ofwhich are held together by a wrought-iron ring, 04, and both rings o3 02 are protected on their outer sides by a ring, 05, which is provided with depressions for the protection ot' the nuts 0G, applied to the bolts g3. The nuts o', applied to the opposite ends of the bolts g2, are arranged on the outer side of the disk E.

The pins G3 are secured to the disk E, near its periphery, by a cast ring, l), the sections of which are held together by a wrought-iron ring, P', and the pins G3 are held at their op- IOO posite ends in a cast ring, P2, the sections of which are held together by a wrought ring, P3. The outer edge of the disk E is protected by a cast ring, P4, provided with depressions for the reception of the nuts p applied to the bolts g5, and the outer side of the rings P2 P3 is protected by a ring, P5, provided with depressions for the reception of the nuts p'.

The ring N is composed of a suitable number of sections, some of which (marked Q) are made larger than the rest, and provided on their inner sides with cavities q, which can be filled with lead or other heavy metal, as may be necessary for balancingthe disk. Ary desired number of these balancing-sections may be applied or removed as may benecessary in order to effect the desired balance. Similar balancing-sections are interposed between the sections of the ring P4, which is applied to the disk E.

R represents the upper side pieces of the casing in which the cages are arranged, and S represents the hoop or semi-cylindrical piece which is secured between the side pieces R. The lower horizontal edge of each side piece R is provided with an angle-iron, r, which is riveted or otherwise secured to the side piece, R, and which is bolted to a flange, r', formed on the upper edge of the respective lower side piece, A A'. The lower edge, r2, of each side piece It projects beyond the bottom of the angle-iron into a recess, r3, formed in the upper side of each side piece A A', whereby a tightjoint between the upper and lower side pieces of the easing is formed and the escape of dust prevented.

T represents a ring composed of a suitable number of sections applied to the inner sideof each side piece R, along its semicircular margin; and T' is a ring applied to the outer side of each side piece R and overlapping the edge thereof and bearing against the rear side of the ring. T. The latter is provided on its inner side with a circular groove, t, in which the edge of the hoop S is inserted, and in which the hoop is held by bolts t', passing across the case outside ot' the hoop S and through the rings T T'. The latter are provided with depressions for the reception ot' the nuts t2, which are applied to the bolts t'. The hoop S is provided on its inner side with a wear-plate, S', removably secured by bolts s. Upon releasing the bolts t' the parts which constitute the upper halt' of the case are readily separated, and they are as readily secured together when required.

The pins, rings, and plates which compose the revolving cages are also readily separated and'secured together, whereby the machine is adapted to be shipped to distant places where the means ot' transportation are inadequate to move the machine when put together.

I claim as my inventionl. In adisintegrating-mill, the combination of two or more concentric rows of square disintegratingpins, arranged with their edges facing each other, and shafts which cause the several rows of pins to rotate in opposite directions,whereby the dat workingfaces of the pins in the inner row drive the material squarely aga-inst the fiat working-faces of the pins in the next outer row, and whereby rapidly contracting and enlarging spaces are formed between the pins, which insure a thorough disintegration of the material and prevent the material from lodging between the pins, substantially as set forth.

2. The combination, with the disks E and F, and ring H, supported on the disk F, of square pins G' G2 G3 and rings o, P, and M', attached respectively to the disk E and ring H, and provided with square recesses in which the pins are removably secured, substantially as set forth.

3. In a disintegrating-mill, the combination, with a stationary breaker-arm, I, of an endless row ot' separate disintegrating-pins G, arranged alternately at a greater and less distance from their axis of rotation, the breakerarm bein g arranged within the endless row ot pins, whereby shoulders of unequal depth are successively formed between the rotating pins and the breaker-arm, and the thorough breaking ofthe material and its escape outward through the spaces between thepins is insured, substantially as set forth.

4. The combination,with the disk F and annular plate H, of the protecting-plate H', pins G G2, sectional cast-rings M' M2, and wrought rings M M2, substantially as set forth.

5. The combination, with the disk E, provided with protectingplate E', of the pins G G3, sectional cast rings 0 03, and wrought rings 0' o4, substantially as set forth.

6. The combination, with the disk of a disintegrating mill, of a marginal protecting-ring provided with one or more removable balancing-plates Q, forming part of the protectingring, and provided with depressions for the reception of balancing material, substantially as set forth.

7. The combination, with the disk E, ofthe ring P, applied to the inner side of the disk, near the edge thereof, for the reception of the outer row ot' disintegrating-pins, and the protecting-ring P4 attached to the outer side ot' the disk E, near the edge thereof, substantially as set forth.

8. The combination, with the lower side pieces, A A', provided with flan ges r' and recesses r3, of the upper side pieces, R, provided with angle-irons 1^ and projecting edges r2, entering the recesses r3, substantially as set forth.

9. The combination, with the side pieces It R, provided with rings T, having grooves t, of the hoop S, provided on its inner side with a removable wear-plate, S', and fitted in said grooves and secured by bolts t', substantially as set forth.

LEWIS J. BENNETT.

Witnesses:

JN0. J. BONNER, EDW. G. BRADY.

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